Chromatographic detection device and method

Abstract

The invention provides a chromatographic detection device and a chromatographic detection method. The chromatographic detection device comprises a container, a combustion chamber, an air passage, a sample gas passage, a combustible gas passage, a first flow limiting unit and a second flow limiting unit, wherein the combustion chamber is arranged in the container; the container is provided with aninlet and an outlet; the air passage is provided with a flow controller; air after the flow control enters the container through a first branch and enters the combustion chamber through a second branch; the sample gas passage is communicated with the combustion chamber; the combustible gas passage is provided with a switching unit; a first outlet of the switching unit is communicated with the combustion chamber through a third branch; a second outlet of the switching unit is communicated with the combustion chamber through a fourth branch; the first flow limiting unit is arranged on the secondbranch; the second flow limiting unit is arranged on the fourth branch. The chromatographic detection device and the chromatographic detection method have the advantages that the structure is simple;the automation is realized, and the like.

Description

technical field [0001] The invention relates to chromatographic analysis, in particular to a chromatographic detection device and method. Background technique [0002] In recent years, driven by national policies, gas chromatography has been widely used in the field of environmental protection. In order to improve the efficiency of on-site detection and the effectiveness of data measurement, online gas chromatography and portable gas chromatography came into being. With the increase of application scenarios, in order to meet the needs of different working conditions, the requirements for gas chromatographic detectors are also getting higher and higher. In some petrochemical industries, especially places with potential explosion hazards, existing gas chromatographic detectors (such as FID and FPD, etc.) cannot be directly installed at the explosion site due to the need for large power output and the existence of flames that may cause combustion and explosion of flammable gas...

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Problems solved by technology

[0004] 1. It is not enough to apply to the use requirements of explosive scenes;

[0005] 2. After the flame of the detector is packaged in a closed space, the water vapor generated by the combustion cannot be discharged in time and flows back into the detector, which is not conducive to maintaining the flame temperature required for sample ionization; and the formation of a high-temperature and high-humidity environment is easy to cause The accelerated aging of other devices in the confined space reduces the service life;

[0006] 3. If the generation of water vapor is reduced by reducing the flow of hydrogen and increasing the flow of assisted gas, it may be more difficult to ignite due to the reduction of hydrogen-to-air ratio

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